Apologies for yet another EGR-related question, I'll keep the saga as brief as I can and would appreciate comments.

 

Fabia 1.4 petrol, year 2000, estate, engine code 6Y5

Changed throttle body, made a great difference to starting, running, idling - everything much improved.

Fault codes cleared and no more EM light on the dash.

Having read all the comments on here about changing the coolant temp sensor, I bought a new one of these at the same time as the TB.

The gauge hardly gets off cold, which presumably means the ECU thinks the engine is running colder than it actually is and is over-fuelling.

In an attempt to get the old sensor out I managed to snap the EGR vacuum breather pipe - it's so brittle after 19 years.

The engine still seems to runs well, but I am wondering if there's any harm leaving the elbow/tube/filter off?

I have an EM fault showing on the dash again since I broke that off, but haven't read the codes yet so not sure what that will indicate.

 

So, I attached a photo; the yellow arrow shows where the vacuum pipe came off.

And the green arrow shows what I think is the coolant temp sensor - if it is I can't see how to get my digits around it to remove it, what a place to put it, facing down and all.

 

Would some kind soul confirm that this is (or isn't) the coolant temp sensor please?

 

Many thanks all .... 

 

 

Yep, green arrow is coolant temp sensor.

EGR valve won't miss the pipe/filter. Easy to acquire/replace from scrapyard stock though.

 

I suspect the temperature fault may be thermostat instead of temp sensor, or as well as, unless there's any history of it having been replaced since factory.

 

Engine code will be AUB if manual transmission or AUA if automatic, I think.

Thank you for your comments Wino, much appreciated.

You are correct, engine code is AUB (manual), not sure where 6Y5 came from, I think it was suggested when I was looking for a compatible throttle body.

I'll get the temp sensor changed first and see what happens, it only cost £4.99 and may make all the difference.

If not we'll look at the thermostat, I don't think it's been changed.

 

Experienced this exact issue. Also figured to check the temp sensor first. It was the thermostat.

Quick way to see if your thermostat is stuck open is to check your coolant overflow tank. If its circulating while the engine has just started (is cold). Its stuck open. It isn't supposed to circulate until the car is at operating temperatures and the thermostat opens. As before that time its coolant only circulating inside of the engine.

Thermostat is easy to replace.